Gedeon pierard and victor guinet



(No Model.) I

G. PIBRARD 82; V. GUINET.

HIGH 0R LOW WATER ALARM FOR STEAM BOILERS. No. 543,139. Patented July 23, 1895.

i'iy. 1.

Zesses: Inventor;

UNITED STATES PATENT OFFICE.

GEDEON PIERARD AND VICTOR GUINET, OF MONTREAL, CANADA.

HIGH OR LOW WATER ALARM FOR STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 543,139, dated July 23, 1895.

Application filed March 25, 1895. Serial No. 643,116. (No model.)

To aZZ whom it may concern:

Beit known that we, GEDEON PIERARD and VICTOR GUINET, citizens of Canada, residing in the city of Montreal, in the district of Montreal, in the Province of Quebec, Canada, have invented certain new and useful Improvements in High and Low Water Alarms for Steam-Boilers; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part hereof.

The object of our invention is a device that will give an alarm by means of a steam-whistle Whenever the water in the boiler falls below or rises above certain fixed points that have been decided upon as the limit of variation of the level of the surface of the water.

In the drawings, Figure 1 is an elevation of a boiler fitted with. our alarm, part of the boiler being broken out to show the interior, the alarm being in its normal position. Fig. 2 is an enlarged view of the apparatus, showing the position of the lovers when alarm is given for low water.

The alarm may be fixed on any steam-boiler. An ordinary horizontal return-tube boiler A is here shown to illustrate the device.

A steam-whistle B is secured to the top of the boiler A, a stop-cock 0 being interposed between the Whistle and the boiler. On either side of the whistle and secured thereto is a standard D E, one, the former, shorter than the latter. In the upper end of the short standard D is pivoted. one end of the lever F, which passes over the top of the steam-Whistle B and presses on the stem 1) of the valve of the whistle, and thus keeps the valve closed, a weight f giving the necessary pressure. The lever F passes through the standard E, which is slotted to allow free vertical movement of the said lever. The free end of this lever is provided with a'loop G, through which passes a vertically-depending rod, which will be hereinafter described.

In the upper end of the standard E is pivoted a lever H. One end of this lever reaches over the top of the whistle and is there connected by a link h to the lever F. The other end of the lever is provided with a loop I, over the loop G, the vertical rod passing through both loops.

A standard J is secured to the top of the boiler A near the whistle B and on the same side of the whistle as the smaller standard D. This standard J has pivoted in its upper end a lever K, having a grooved segment is at one end and a balance-weight at the other end. The segment carries a short chain m, which has secured to its end a rod M. This rod passes through a stuffing-box it into the inte-- rior of the boiler, where its end is secured to a float N, which may be made of wood and bound with metal. Adepending rod 0 is pivoted near the weight L. This rod passes through the loops G and I in the levers F and H. Pins P are secured in the rod 0 above and below the loops G and I, not close to the loops, but, as shown in Fig. 1, one a short distance below and the other a short distance above. w

The operation of the device is as follows: The normal position of the device is shown in Fig.1. It will be seen that the levers are all level, the lever F pressing on the whistle valve-stem h and preventing the steam from passing through the whistle. Should the water fall the-float will go with it, as seen in Fig. 2, pulling down the end of the lever K, carrying the segment and raising the weighted end. This raises the depending rod 0 and causes the lower pin ,P to raise up the lever F and so allow the piston 17 of the valve of the whistle to rise, admitting the steam and cansing the whistle to sound, calling the attention of the engineer to the fact that there is something wrong. In the case of high water the float is raised and the lever assumes the position shown by the dotted lines in Fig.2, thus causing the upper pin P of the rod 0 to press on the lever H, which by the link it raises the lever F and allows the valve to open, as before described.

We claim as our invention- 1. In a high and low water alarm for steam boilers, the combination with a whistle secured on and connected with a steam boiler, standards secured, one on one side and one on the link connecting one end of the lever with-the lower lever before mentioned, of means for raising the lower lever when the water in the said boiler is low or depressing the upper lever when the water is too high, substantially as set forth.

2. In a high and low water alarm for steam boilers, the combination with the float N having secured thereto the rod M, secured by a short chain to a grooved segment on a lever K, the lever K pivoted in a standard secured on a boiler, a weight L carried at or near the end of the said lever, a depending rod 0 pivoted near the weight L,tw0 pins Psecured in the said depending rod 0, of the steam whistle having standards D and E, one on either side, the lever F pivoted in the shorter standard D, a weight carried near the free end of the said lever, a loop G at its free end, the said lever passing over and pressing down the valve stem 1) of the whistle, when the said lever is in its normal position, the lever H carried in the standard E having a loop I at Maire one end and a link h at the other, the link 7 connecting the lever II to the lever F, substantially as set forth.

3. In a high and low water alarm for steam boilers, the combination with the lever K, havlog a float N secured thereto bya chain pass ing over a grooved segment on the'end of the said lever, pivoted depending rod 0, pins P secured in the said rod, of the loops G and I carried by the levers F and H and through which the said rod 0 passes, the link It conmeeting the said levers F and II, and the valve stem 1) of a steam whistle adapted to be operated by the saidlever F, substantially as set forth.

Signed at Montreal this 1st day of March, 1895. i

GEDEON PIERARD. VICTOR GUINET.

In presence of P. A. BROUDOIN, J 0s. FLoIsY. 

